Buderus Logano plus GB402 Instruction Manual

Read carefully prior to installation and maintenance.
Installation and maintenance instructions for contractors
Gas-fired condensing boiler
Logano plus GB402
6 720 820 700 (2018/01) GB

Table of Contents
Logano plus GB402 – 6 720 820 700 (2018/01)
2
Table of Contents
1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . . . 4
1.1 Explanation of symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Information on the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 EU Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Determined use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 About these instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Tools, materials and equipment . . . . . . . . . . . . . . . . . . . . 5
2.5 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.6 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.7 Dimensions and specifications . . . . . . . . . . . . . . . . . . . . . 8
2.7.1 Logano plus GB402 dimensions . . . . . . . . . . . . . . . . . . . 8
2.7.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.8 Product data for energy consumption . . . . . . . . . . . . . 11
3 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Standards, regulations and directives . . . . . . . . . . . . . 12
3.2 Notes on installation and operation . . . . . . . . . . . . . . . 12
3.3 Duty to obtain a permit and provide notification . . . . . 12
3.4 Installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5 Quality of the heating water . . . . . . . . . . . . . . . . . . . . . 12
3.6 Pipework quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.7 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8 Combustion air connection/flue connection . . . . . . . . 13
3.9 Combustion air quality . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.10 Validity of regulations . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Transporting the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Transporting the boiler by crane/hoist . . . . . . . . . . . . 14
4.1.1 Lifting the boiler off the pallet . . . . . . . . . . . . . . . . . . . 14
4.2 Transporting the boiler on rollers . . . . . . . . . . . . . . . . . 14
5 Installing the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Boiler room requirements . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Wall clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Floor-standing boiler levelling . . . . . . . . . . . . . . . . . . . 15
6 Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1 Establishing the flue gas connection . . . . . . . . . . . . . . 16
6.2 Installing the condensate hose . . . . . . . . . . . . . . . . . . . 17
6.3 Fitting the boiler cover . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4 Connecting the air supply
(for balanced flue operation) . . . . . . . . . . . . . . . . . . . . .18
6.5 Establishing the heating circuit connection . . . . . . . . . 19
6.5.1 Connecting the flow . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.5.2 Installing the safety assembly (on site) . . . . . . . . . . . . 19
6.5.3 Connecting the return . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.5.4 Installing a DHW cylinder . . . . . . . . . . . . . . . . . . . . . . . 20
6.6 Filling the heating system and checking for leaks . . . . 21
6.7 Making the electrical connection . . . . . . . . . . . . . . . . . 22
6.7.1 Fitting the control unit . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.7.2 Establishing the power supply connection . . . . . . . . . 22
6.8 Providing the fuel supply . . . . . . . . . . . . . . . . . . . . . . . 23
7 Start up the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1 Checking the operating pressure . . . . . . . . . . . . . . . . . 24
7.2 Checking for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3 Recording gas parameters . . . . . . . . . . . . . . . . . . . . . . 25
7.4 Check the system equipment level . . . . . . . . . . . . . . . 25
7.5 Purging the gas line . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.6 Checking the ventilation and extract air apertures
and the flue connection . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.7 Making the heating system operational . . . . . . . . . . . . 26
7.8 Commissioning the control unit and burner . . . . . . . . 26
7.8.1 Switching on the boiler at the BC10 . . . . . . . . . . . . . . 26
7.8.2 Carrying out a flue gas test . . . . . . . . . . . . . . . . . . . . . . 26
7.8.3 Accessing the service level on the RC35 and
displaying monitoring data . . . . . . . . . . . . . . . . . . . . . . 27
7.9 Measuring the gas supply pressure and
static pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.10 Checking and adjusting the gas:air ratio . . . . . . . . . . . 28
7.10.1 Adjusting CO2 at full load (70-80 %) . . . . . . . . . . . . . . 28
7.10.2 Setting and checking the CO2 values under
partial load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.10.3 Checking the CO2 setting under full load (70-80 %) . 29
7.11 Switching the status display on the BC 10 to show
the boiler temperature status . . . . . . . . . . . . . . . . . . . . 29
7.12 Returning to operating mode from the flue gas test . . 29
7.13 Recording actual values . . . . . . . . . . . . . . . . . . . . . . . . 29
7.13.1 Feed pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.13.2 Negative pressure in the supply air duct in
open-flue mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.13.3 CO value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.14 Function tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.14.1 Checking the ionisation current (flame current) . . . . . 30
7.15 Check for water leaks during operation . . . . . . . . . . . . 30
7.16 Installing casing parts . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.17 Informing the user, handing over technical documents 30
7.18 Commissioning report . . . . . . . . . . . . . . . . . . . . . . . . . 31
8 Shutting down the heating system. . . . . . . . . . . . . . . . . . . . . 32
8.1 Shutting down the heating system via the control unit 32
8.2 Shutting down the heating system in an emergency . . 32
9 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table of Contents
Logano plus GB402 – 6 720 820 700 (2018/01) 3
10 Inspection and servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10.1 Preparing the boiler for inspection . . . . . . . . . . . . . . . . 32
10.2 General work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.3 Internal leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.3.1 Determining the test volume . . . . . . . . . . . . . . . . . . . . . 33
10.3.2 Carrying out a leak test . . . . . . . . . . . . . . . . . . . . . . . . . 34
10.4 Checking the heating system operating pressure . . . . 35
10.5 Measuring carbon dioxide content . . . . . . . . . . . . . . . . 35
10.6 Clean burner and heat exchanger . . . . . . . . . . . . . . . . . 35
10.6.1 Removing and cleaning burner . . . . . . . . . . . . . . . . . . . 36
10.6.2 Clean heat-exchangers . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.7 Inspecting the burner electrodes . . . . . . . . . . . . . . . . . 39
10.8 Replacing components . . . . . . . . . . . . . . . . . . . . . . . . . 39
10.8.1 Removing the gas valve . . . . . . . . . . . . . . . . . . . . . . . . . 39
10.8.2 Changing the gas filter . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.8.3 Removing the fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10.9 Refitting detached parts . . . . . . . . . . . . . . . . . . . . . . . . 41
10.9.1 Fitting the fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.9.2 Fitting the ventilation air collector and the gas valve . . 41
10.9.3 Fitting the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.9.4 Fitting the gas line to the gas valve . . . . . . . . . . . . . . . . 42
10.9.5 Fitting the ventilation air unit . . . . . . . . . . . . . . . . . . . . 42
10.10 Check for water leaks during operation . . . . . . . . . . . . 42
10.11 Checking the ionisation current . . . . . . . . . . . . . . . . . . 42
10.12 Completing inspection and maintenance . . . . . . . . . . . 42
10.12.1Removing meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10.12.2Installing casing parts . . . . . . . . . . . . . . . . . . . . . . . . . . 42
10.12.3Checking the gas/air ratio . . . . . . . . . . . . . . . . . . . . . . . 42
10.12.4Confirming inspection and maintenance . . . . . . . . . . . 42
10.13 Replacing the gaskets subject to time in use . . . . . . . . 42
10.14 Inspection and maintenance reports . . . . . . . . . . . . . . 43
11 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11.1 Recognising the operating condition and
clearing faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
11.2 Emergency mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11.3 Operating and fault displays . . . . . . . . . . . . . . . . . . . . . 47
11.3.1 Operating messages of the controller . . . . . . . . . . . . . 47
11.3.2 Control unit fault displays . . . . . . . . . . . . . . . . . . . . . . . 48
11.3.3 Status indicator of the burner control unit. . . . . . . . . . 55
12 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
12.1 Sensor curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
12.1.1 Temperature sensor at the burner control unit . . . . . . 56
12.2 Hydraulic resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
12.3 Connecting diagram MC10 . . . . . . . . . . . . . . . . . . . . . . 56
12.4 SAFe connection diagram . . . . . . . . . . . . . . . . . . . . . . . 59
12.5 Conversion of vol. – % CO2 into vol. – % O2 for
burner setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Keyword index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

1Key to symbols and safety instructions
Logano plus GB402 – 6 720 820 700 (2018/01)
4
1 Key to symbols and safety instructions
1.1 Explanation of symbols
Warnings
Keywords at the start of a warning indicate the type and severity of the
ensuing risk, if measures to prevent the risk are not taken.
•NOTICE indicates that material damage may occur.
•CAUTION indicates that minor to medium personal injury may occur.
•WARNING indicates that severe personal injury may occur.
•DANGER indicates that life-threatening personal injury may occur.
Important information
Additional symbols
1.2 Safety precautions
If you smell gas
▶ Close gas isolation valve.
▶ Open windows and doors.
▶ Never operate electrical switches, including telephones, plugs or
doorbells.
▶ Extinguishanynakedflames.Donotsmoke!Never use any lighters or
sources of ignition of any kind!
▶ Warn all occupants in the building, but do not ring doorbells.
▶ If you can actually hear gas escaping, leave the building immediately.
Prevent third parties from entering and notify police and fire brigade
from outside the building.
▶From outside the building, call your gas supplier and licensed
contractor.
Danger if you smell flue gas
▶ Switch off the boiler (page 32).
▶ Open windows and doors.
▶ Notify an approved contractor.
Danger of poisoning. Insufficient ventilation can lead to dangerous
flue gas leaks.
▶ Never block ventilation and extract air apertures or reduce their size.
▶ The boiler must not be operated, unless you immediately remedy the
fault.
▶ Inform the system user in writing of the problem and associated
danger.
Danger of escaping gases
▶ Ensure that the flue pipes and gaskets are not damaged.
▶ Ensurethat the boiler is not equipped with aventilationair damper or
a thermostatic shut-off damper downstream of the flue connection.
Danger of explosion of flammable gases
▶ Any work on components that carry gas may only be carried out by a
licensed contractor.
Danger posed by explosive and easily flammable materials
▶ Never use or store easily flammable materials (paper, curtains,
clothing, thinners, paints, etc.) in the vicinity of the boiler.
Danger through electric shock when the boiler is open
▶ Before opening up the boiler, isolate it completely from the mains
power supply and ensure the power cannot be inadvertently
reconnected.
▶ It is not enough to switch off the control unit.
Danger through short circuits
To prevent short circuits:
▶ Only use original Buderus cables.
Siting and adjustment
▶ Correct and proper installation and adjustment of the burner and the
control unit are the fundamental requirements for safe and
economical operation of the boiler.
▶ Only permit an authorised contractor to install the boiler.
▶ Never modify any parts for flue gas routing.
▶ Work on components in contact with gas must only be carried out by
certified gas fitters.
▶ Electrical work must only be carried out by qualified electricians.
▶ Boilers must be installed in a separate installation location which is
not normally occupied by persons.
▶ Do not cover or reduce the size of ventilation apertures in doors,
windowsandwalls. If draught-proof windows are fitted, ensure there
is an adequate supply of combustion air.
▶ Observe all the other applicable technical documentation for other
system components, accessories and spare parts.
▶Never shut off safety valves!
Water may escape from the safety valve for the hot water system and
piping when the water is being heated.
Risk of damage due to operator error
Operator errors can result in personal injury and material damage.
▶ Ensure that children never operate this appliance unsupervised or
play with it.
▶ Ensure that only personnel who can operate this appliance correctly
have access to it.
Instructing the customer
▶ Explain to the customer how the boiler works and how to operate it.
▶ The user is responsible for the safety and environmental compliance
of the heating system (Federal Immission Act [Germany]).
▶ Inform customers that they must not carry out any modifications or
repairs.
▶ Maintenance and repairs may only be carried out by an authorised
contractor.
▶ Only use genuine spare parts!
▶ Any other combinations, accessories and wearing parts may only be
used if these are specifically designed for the application and impair
neithertheperformancecharacteristics nor the safety requirements.
Warnings in this document are framed and identified by
a warning triangle printed against a grey background.
Importantinformation where thereisno risk to peopleor
property is indicated with the adjacent symbol. It is
bordered by lines above and below the text.
Icon Means
▶ Action step
Cross-reference to other parts of this document or to
other documents
• List/list entry
– List/list entry (second level)
Table 1

2Information on the device
Logano plus GB402 – 6 720 820 700 (2018/01) 5
2 Information on the device
2.1 EU Declaration of Conformity
This product, in design and operation, conforms to the European
Directives and supplementary national requirements. Compliance is
demonstrated by the CE marking. You may request the declaration of
conformity for the product. Please refer to the contact address on the
back cover of these instructions.
2.2 Determined use
The Logano plus GB402 is designed for conventional use as a gas
condensing boiler for DHW and central heating.
Only gas supplied by the public gas supplier can be used.
Observe the details on the data plate and the specification
(Chapter 2.7, page 8) to ensure correct use.
2.3 About these instructions
These installation and maintenance instructions contain important
informationforthesafeand appropriateinstallation, commissioningand
servicing of this gas condensing boiler.
These installation and maintenance instructions as well as the service
instructions are designed for contractors who, through their technical
trainingand experience, are knowledgeable in handling heating systems
and gas installations.
The following documents are available for the Logano plus GB402:
• Ower’s manual
• Operating instructions, MC10 control unit
• Installation and Maintenance Instructions
• Operator’s log
• Technical guide
Theabove documentsare also availablefor downloadingviathe Buderus
website.
Please contact us with suggestions for improvement or if you notice any
errors. For contact addresses and our internet address, see the back
cover of this document.
2.4 Tools, materials and equipment
For boiler installation and maintenance you will need the following:
• Standard tools used for central heating, gas and water installation,
plus set of a metric open-ended spanners and Allen keys.
• The RC35 programming unit as a monitoring device for
commissioning, inspecting and servicing the boiler.
The following may also prove useful:
• 5 pipes (approx. R 1¼ ", approx. 900 mm long) as supports on which
to roll the boiler into place
• Cleaning blade and/or chemical cleaning agent for wet cleaning
(available as accessories)
Approval data
Product ID number CE-0085BU0332
Table 2 Approval data
APC with Buderus LogamaticECO-Soft4000/EMSand a
service key can also be used as a monitoring device.

2Information on the device
Logano plus GB402 – 6 720 820 700 (2018/01)
6
2.5 Product Description
The Logano plus GB402 is a gas condensing boiler with an aluminium
heat exchanger.
Fig. 1 Logano plus GB402 - main components
[1] Boiler front panel
[2] Gas valve
[3] Control unit (MC10 and BC10)
[4] Gas burner (burner rod)
[5] Boiler block with thermal insulation
[6] Boiler casing
[7] Condensate pan and siphon
[8] Burner control unit
The main components of the Logano plus GB402 (Fig. 1) are:
• Control unit
• Appliance frame and casing
• Boiler block with thermal insulation
• Gas burner
The control unit monitors and controls all electrical boiler components.
The boiler block transfers the heat generated by the burner to the
heating water. The thermal insulation reduces the radiation and standby
losses.

2Information on the device
Logano plus GB402 – 6 720 820 700 (2018/01) 7
Fig. 2 Logamatic BC10 basic controller - control elements
[1] "ON/OFF" switch
[2] Set DHW temperature rotary selector
[3] "DHW heating" LED
[4] Status display
[5] Maximum boiler temperature rotary selector
[6] "DHW demand" LED
[7] Base plate with a slot for a programming unit, e.g. RC35 (behind
the fascia)
[8] "Burner" (ON/OFF) LED
[9] Connection socket for diagnostic plug
[10] "Status display" key
[11] "Flue gas test" key
[12] "Reset" key (fault release button)
Logamatic BC10 basic controller (Fig. 2).
TheLogamatic BC10 basic controller providescontrolover the standard
functions of the heating system. It provides functions including the
following:
• Switching the heating system on/off
• Setting the DHW temperature and maximum boiler water
temperature in heating mode
• Status indication lamp
Figure 2 provides an overview of the control elements of the Logamatic
BC10 basic controller.
Programming units (such as the RC35*) offer many additional functions
for the convenient control of your heating system.
* available separately
2.6 Scope of delivery
The Logano plus GB402 is supplied as standard with a Logamatic BC10
basic controller and the MC10 control unit in 3 separate packages.
▶ Upon receipt check that all packaging is in perfect condition.
▶ Check the scope of delivery for completeness.
▶ Dispose of packaging in an environmentally responsible manner.
ACCESSORIES
Many individual accessories are available for this boiler.
For details regarding suitable accessories, see the catalogue.
The following accessories are available from your local sales office:
• Safety valve or safety assembly
• Exhaust system
• Supply air system
• User interface, e.g. RC35
• Silencer
• Ventilation air adaptor (accessory for balanced flue operation)
9
6720614021-03.2RS
2 4 5
12 10 8
11 71
36
Packed unit Component Packaging
1 (boiler) Assembled boiler
(excluding casing)
1 shrink-wrap package
on a pallet
Siphon 1 shrink-wrap package
Foot bolts 1 shrink-wrap package
Boiler flue connection 1 carton
Label for gas type
conversion
1 shrink-wrap package
Technical documents 1 shrink-wrap package
2 (separate) Casing 1 carton
3 (separate) MC10 control unit
(includingBC10)
1 carton
Table 3 Scope of delivery

2Information on the device
Logano plus GB402 – 6 720 820 700 (2018/01)
8
2.7 Dimensions and specifications
2.7.1 Logano plus GB402 dimensions
Fig. 3 Dimensions and connections for the Logano plus GB402 (dimensions in mm)
AA Flue outlet
AKO Condensate outlet
EV Combustion air pipe inlet (balanced flue operation only,
corresponding connections are available as accessories)
GAS Gas Supply
MAG Optional connection for a diaphragm expansion vessel to protect
a single boiler
RK Boiler return
ST Connection for safety valve or safety assembly
VK Boiler flow
min. 90
max. 7
Ø 250 +0,3
+0,7
Y
Y
Ø 201
max. 7
+1,2
-0
min. 8
min. 90
Ø 200 ±0,5
max. 7
min. 90
max. 30
6 720 618 585-16.4T
0
EN 1506
d=200

2Information on the device
Logano plus GB402 – 6 720 820 700 (2018/01) 9
2.7.2 Specifications
Boiler size (output - no. of sections)
Unit GB402-320 - 5 GB402-395 - 6 GB402-470 - 7 GB402-545 - 8 GB402-620 - 9
Rated heat input [Qn (Hi)]1) kW 61.0 – 304.8 75.2 – 376.2 89.5 – 447.6 103.8 – 519.0 118.0 – 590.0
Rated output [Pn 80/60]1)
Temperature pairing 80/60 °C
kW 58.9 – 297.2 72,6 – 367,4 85.2 – 435.8 100,7 – 507,0 114,9 – 578,2
Rated output [Pn 50/30]1)
Temperature pairing 50/30 °C
kW 66,7 – 320,0 80,5 – 395,0 95,6 – 468,2 113,0 – 545,0 127,6 – 621,4
Boiler efficiency, maximum performance
at 80/60 °C
% 97.5 97.6 97.3 97.7 98.0
Boiler efficiency, maximum performance
at 50/30 °C
% 105.1 105.0 104.6 105.0 105.3
Seasonal efficiency [to DIN], heating curve 75/60 °C % 106.0 106.3 106.6 106.3 106.4
Seasonal efficiency [to DIN], heating curve 40/30 °C % 109.6 109.4 109.7 109.3 110.4
Standby heat loss at excess temperature 30/50 K % 0.20/0.33 0.16/0.27 0.14/0.23 0.12/0.20 0.11/0.17
Heating water circuit
Boiler water content [V]1) I 47.3 53.3 59.3 65.3 75.3
Pressure drop on the heating water side at 20 K mbar 99 105 95 108 113
Maximum flow temperature heating/DHW mode °C 30 – 85
Safety limit/high limit safety cut-out [Tmax]1) °C 100
Maximum permissible operating pressure [PMS]1) bar 6
Maximum differential between flow
and return temperatures
Full Load K 30 30 30 30 30
Partial load K 40 40 40 40 40
Maximum permitted flow rate through the
boiler2)
l/h 34400 42463 50525 58588 66650
Pipework connections
Gas connection inch 2
Heating water connection DN/mm 80
Condensate connection inch ¾ "
Flue gas values
Exhaust connection mm 250
Volume of condensate for natural gas G20, 40/30 °C l/h 30.8 39.2 46.2 55.9 64.7
Exit flue gas mass flow Full Load g/s 142.4 174.5 207.1 240.6 271.9
Partial load g/s 28.7 36.8 40.6 48.0 53.2
Flue gas temperature 50/30 °C Full Load °C 45 44 44 43 44
Partial load °C 30
Flue gas temperature 80/60 °C Full Load °C 65
Partial load °C 57 58 58 58 58
CO2value, natural gas Full Load %9.1
Partial load %9.3
Standard CO emissions factor mg/kWh 20
Standard NOxemissions factor mg/kWh 40
Fan for residual pressure differential
(flue gas and combustion air system)
Pa 100
Exhaust system
Temperature classification to be used
for flue system in accordance with EN 1443
min. T120 min. T120 min. T120 min. T120 min. T120
Pressure classification to be used
for flue in accordance with EN 1443
H1,
P1
H1,
P1
H1,
P1
H1,
P1
H1,
P1
Pressure classification to be used
for connection piece in accordance with EN 1443
H1,
P1 with additional mechanical impact stability up to 5000 Pa
Condensate resistance classification to be used for
flue system in accordance with EN 1443
WWWWW
Corrosion resistance classification to be used
for flue system in accordance with EN 1443
Min. 2 Min. 2 Min. 2 Min. 2 Min. 2
Table 4 Specifications

2Information on the device
Logano plus GB402 – 6 720 820 700 (2018/01)
10
Soot combustion resistance classification to be used
for flue system in accordance with EN 1443
G, O G, O G, O G, O G, O
Maximum permitted flue gas return flow under wind
conditions
%1010101010
Maximum permitted combustion air temperature °C 35 35 35 35 35
Type (according to DVGW regulations) Open flue operation: B23, B23P
Balanced flue operation: C13, C33, C43, C53, C63, C83, C93
Type (Belgium and Netherlands) Open flue operation: B23, (B23P only valid for Belgium)
Balanced flue operation: C13, C33, C43, C53, (C63 only valid for the Netherlands),
C83, C93
Electrical details
IP rating - IPX0D
Supply voltage/frequency V/Hz 230/50
Electric consumption power [P(el)]1) Full Load W 418 449 487 588 734
Partial load W 39 45 42 45 49
Protection against electrocution Safety category 1
Maximum permissible unit fuse protection A 10
Appliance dimensions and weight
Handling dimensions width × depth × height mm 781 x 1740 x 1542
Weight (excl. casing) kg 410 438 465 493 520
1) The details [xxx] correspond to the symbols and formula signs used on the type plate.
2) Is to be ensured by means of system sizing, and it corresponds to a minimum differential between flow and return temperatures of 8 K.
Boiler size (output - no. of sections)
Unit GB402-320 - 5 GB402-395 - 6 GB402-470 - 7 GB402-545 - 8 GB402-620 - 9
Table 4 Specifications
Boiler size
Natural gas E, H, Es
(G20) Natural gas L (DE)
Natural gas LL, L, Ei
(G25)
Natural gas Lw (G27)
(PL)
Natural gas S (G25.1)
(HU)
Wobbe index
14.9 kWh/m3 1) Wobbe index 12.8 kWh/m31) Wobbe index 12.2 kWh/m3 1) Wobbe index 11.4 kWh/m3 1) Wobbe index 11.5 kWh/m3 1)
Gas throughput Gas throughput Gas throughput Gas throughput Gas throughput
[m3/h] [m3/h] [m3/h] [m3/h] [m3/h]
320 -5 32.3 34.3 37.6 – –
395 -6 39.8 42.4 46.4 48.5 46.2
470 -7 47.4 50.4 55.2 57.8 55.0
545 -8 55.0 58.4 64.0 67.1 63.9
620 -9 62.5 66.5 72.8 76.2 72.6
Table 5 Gas throughput (relative to 15 °C gas temperature and 1013 mbar air pressure)
1) Upper Wobbe index for 0 °C, 1013 mbar
Country Boiler size
Nominal gas
pressure [mbar] Gas category
Gas family, gas group and reference gas
set on delivery
Set to rated gas pressure on
delivery [mbar]1)
EN 320-620 20 I
2ELL 2E, G20 20
AT, BY, CH, CZ,
DK, EE, ES, GB,
HR, IE, IT, LT, LV,
PT, RO, RS, RU,
SI, SK, TR, UA
320-620 20 I 2H 2H, G20 20
Table 6 Country-specific gas categories and supply pressures